Cracking the Code of Life: Exploring DNA


Deoxyribonucleic AcidHow does one long molecule control how our body works? DNA contains a code that tells our body how to make proteins. When you look at someone, you cannot see their DNA. However, you can see the proteins that their DNA helped make. How are these proteins made? What kinds of things do these proteins do in our bodies? Use the following links to explore DNA to find out.Explore a stretch of DNA Code and answer these questions:1. What is the on/off switch?2. What is a start codon?3. What is a stop codon?4. What is an intron?5. What is an exon?Explore a Stretch of DNA CodeDNA: The Stuff that Makes ChromosomesHow does DNA fit into chromosomes? And what do chromosomes mean for the human body? Explore this site to see how DNA fits into a chromosome. Answer these questions:1. How long is the DNA molecule that fits in the nucleus of a human cell?2. How does this much DNA fit into a tiny chromosome?Journey Into DNAHow did researchers find out about the DNA code? Explore the following website to sequence DNA for yourself.Sequence DNA for Yourself



Making Proteins LInks for ClassOrganelles in the CytoplasmFrom DNA to ProteinLearn How DNA makes proteins on your own with this interactive website. Answer these questions as you go:1. How are the processes of DNA replication (copying) and protein synthesis alike?2. What are the three types of RNA? 3. What does mRNA do?4. What does tRNA do?5. Where does protein synthesis take place inside the cell?DNA Workshop

RNAi

How does a cell know when it needs to make certain proteins? Are all genes constantly working--full time genes? Or can we call some genes part-time workers? Use this interactive to help you understand how RNAi works in an organism.

RNAi Explained